Final answer:
Monetary policy functions through changes in the overnight loan rate, which affect other short-term interest rates, exchange rates, the quantity of money, long-term real interest rates, consumption, investment, and net exports, collectively influencing aggregate expenditure in the economy.
Step-by-step explanation:
When the Bank of Canada lowers the overnight loan rate, it typically engages in an open market purchase to increase the money supply. As a consequence, other short-term interest rates and the exchange rate tend to fall. This lower cost of borrowing stimulates the increase in the quantity of money and the supply of loanable funds.
The availability of more funds at lower interest rates leads to a decrease in the long-term real interest rate, which in turn encourages spending in the economy. A lower real interest rate makes it more attractive for consumers and businesses to increase consumption expenditure and investment. Additionally, a lower exchange rate renders Canadian exports cheaper and imports more costly, consequently increasing net exports.
Overall, these changes result in a scenario where lower interest rates lead to an increase in aggregate expenditure, boosting economic activity.